Error on taxes

I filed the taxes of a friend of mine using TurboTax. I made an error. For the question: are you a citizen? I said yes. The problem is that it actual misread the rest of the question that stated a citizen who lived in the above countries. Saying yes, gave a refund of $7000 instead of $143. Its did not hit me because I was aware that this year would be offset by the $6000 or $12000 Social security credit. I picked up the error when I did my own taxes. How do I correct? Online (AI?) said wait until my friend got her refund and they return it with a 1040X. Should I wait or file a 1040x now?